Beta vulgaris. Chenopodiaceae family.
Stem and leaf vegetable.
There are different varieties (over 1,400), but the genre of Beta vulgaris is classified into two varieties:
Green Bressane white stalk.
They can be eaten all year round, but the best time is in the fall and winter.
When purchasing, it is critical that they are very fresh, ie very green leaves, shiny, smooth, no pitting or staining, very stiff fronds.
Just endure as much a couple of days in the fridge. It is best to have them in the day.